Electric-lamp fixture.



T. F. MILLER. ELECTRIC LAMP FIXTURE.

' APPLICATION FILED JUNE 6, 1910.

Patented Feb. 28, 1911.

2 SHEETS-SHEET 1.

Attorneys v T. F. MILLER.

ELECTRIC LAMP FIXTURE. APPLIOATION TILED JUNE 6, 1910.

985,432. Patented Feb. 28, 1911.

2 SHEETS-SHEET 2.

Attorneys .1: NORRIS PETERS co., WASHINGTON, D. c.

UNITED STATES PATENT OFFICE.

THOMAS FREDERIC MILLER, OF ST. JOHN, NEW BRUNSVVIGK, CANADA, ASSIGNOR OFONE-EIGHTH TO WALTER GARFIELD MILLER, OF ST. JOHN, CANADA.

ELECTRIC-LAMP FIXTURE.

Application filed June 6, 1910.

Specification of Letters Patent.

Patented Feb. 28, 1911.

Serial No. 565,350.

0 all whom it may concern:

Be it known that I, THOMAS Fnrnnnro Mnaacn. a subject of Great Britain,residing at St. John, in the Province of New Brunswick, Canada, haveinvented certain new and useful Improvements in Electric-Lamp Fixtures;and I do hereby declare that the following a full, clear, and exactdescription of the invtmtion, such as will enable others skilled in theart to which it appertains to make and use the same.

The invention to be hereinafter described relates to electric lamps andmore particularly to are lamp fixtures.

Broadly speaking, it comprises a tubular, rotary, curved arm forsupporting the lamp, means for rotating the arm, and an automatic cutout operated. by the rotating means.

In order more clearly to disclose the construction, operation, and useof the invention, reference should be had to the accompan ying drawingsforming part of the present application.

Throughout the several. figures of the drawings like referencecharacters designate the same parts.

In the drawings: Figure 1 is a side elevation of the invention; Fig. 2is a side elevation of the arm rotating mechanism and connected parts;Fig. 3 is a vertical cross section on line 3-3 of Fig. 2, looking in thedirection of the arrow; Fig. 1 is a plan view of Fig. 2; Fig. 5 is anenlarged detail section of the coupling for suspending the lamp from therotary arm; Fig. 6 is an end view of the rod and its lamp; and Fig. 7 isa similar view of a modification.

The main objects of the invention are to provide a simple, economical,and durable arc lamp fixture, and automatic cut out combined; by whichthe arc lamp may be readily and quickly moved to and from operativeposition, at will.

leferring to the drawings in detail, 1 indicates a deeply curved armadapted to support an arc lamp of usual and well known construction. Thelower end of this arm is journalcd in a casing 2 adapted to be securedto the post for supporting the electric wires. This arm is hollow, ofcourse, to receive the electric wires and is provided with a worm wheel3 adapted to be engaged and driven by a worm 41 secured to the shaft 5journaled in the casing 2 and arranged at right angles to the arm 1.Rotation of the shaft 5, therefore, causes rotation of the curved arm 1.A single half rotation of the arm 1 will move the arc lamp from raisedto lowered position, as shown in Fig. 1. hen lowered for repairs, it isadvisable, of course, to have the lighting current cut otl. Accordingly,a conducting plate 6 is secured to the arm 1 adjacent its lower end.This plate is in the form of a semicircle or an arc and is adjust'ablysecured to the arm 1 by means of a set screw 7. The plate 6 travelsbetween contacts 8 in the lighting wires. Consequently, whenever the endof plate 6 passes from between the contacts, there will be a gap and thecurrent will be broken. Thus, the plate may be adjusted about the arm tomake the break in the cir cuit at any predetermined point, preferably,at the moment that the lamp has been l owercd It is necessary, ofcourse, to provide a suitable connection between the lamp and itssupporting arm, whereby the lamp will not be revolved with thesupporting arm. Such connection is shown in detail in Fig. 5. In thepreferred form, it comprises a shouldered tubular nut 9, a flangedtubular nut 10 adapted to be threaded on to the end of arm 1 to hold thenut 9 in operative position, and a closed screw threaded cap 11 adaptedto be screwed upon the outer threaded end of the tubular not 9. In orderto protect the joints and threads against the weather, a flange 12 isformed on the cap 11 and a shell 13 is secured and extended inwardlybeyond the end of the arm 1. The lamp is hung by a link or the likepassed through a perforated car 14: projecting from the cap 11 and thelight wires are led out through the cap in any usual manner. The tubularnut 9, as will be seen from Fig. 5, is loosely mounted within the nut 10so that the nut 9 may remain unrotated during the rotation of the arm 1,thus rising and falling with it though not rotating with it.

It is advisable, of course, to have the casing 2 adjustable to variouscircumferences. To this end, its back or attaching side is provided withslots 15 in which play the adjusting screws 16 of an adjustable section17. By adjusting this section, the case may be made to fit varioussurfaces.

same, and it is meant to include all such 1 within this applicationwherein only a preferred form has been disclosed.

Having thus fully described my invention what I claim as new and desireto protect by Letters Patent is:

1. A fixture of the character described comprising a curved supportingarm adapted to carry an arc lamp, means for supporting an arc lamptherefrom, means for rotating said arm, and means for automaticallycutting out the electric light circuit when the arm has been moved to apredetermined position.

2. A fixture of the character described comprising a curved supportingarm adapted to carry an arc lamp, means for suspending an arc lamptherefrom, means for rotating said arm, means for automatically cuttingout the electric light circuit when the 3. A fixture of the characterdescribed comprising a curved supporting arm adapted to carry an arclamp, means for suspending an arc lamp therefrom, a worm wheel securedto said arm, a worm intermeshing therewith, and means for operating saidworm.

4. A fixture of the character described comprising a curved supportingarm adapted to carry an electric arc lamp, means for suspending anelectric arc lamp therefrom. a worm wheel secured to said arm, anelectric circuit for lighting the aforesaid lamp, separated contactsincluded in said circuit, a conducting plate secured to the aforesaidarm and adapted to move between said 0011- tacts to make and break thecircuit, a worm intcrmeshing with said worm wheel, and means forrotating said worm.

In witness whereof I have hereunto set my hand in the presence of twowitnesses.

'lllUMAS lfilll lllllltltl )HLLER. Witnesses:

Cmnnxon CARRIGAN,

G. L. BROWN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. G.

